12 Coins
About
A riddle I saw on Ted ed Riddles.
You have 12 coins, one is a fake. You don't know if the fake is lighter or heavier than the normal ones. You must find the fake by using a balance scale up to 3 times. You can draw on the coins to aid you.
Press R to START.
SPACE to weigh.
Left click (hold) to grab a coin. Right click to freeze a coin - then left click to draw on it. Mouse wheel to rotate a held coin.